| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bdd47d33b338982160ba625c3a271001 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D311-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C255-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-34 |
| filingDate |
1968-06-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bd4f21c709c4f2d52d0bab0c47aee3eb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1d52f6362daefb02b7eafbbe11f37591 |
| publicationDate |
1971-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CH-516550-A |
| titleOfInvention |
Process for the manufacture of 3-phenyl-or phenyl-substituted-7-amino-coumarins |
| abstract |
The known compounds, useful as brightening agent intermediates, are prepared by hydrolysing an acrylic acid derivative (where X is COOH, COOR or CN, Ar is opt. subst. phenyl and R is lower alkyl). The OR group is converted to OH and the resulting compound is treated with an acid to cause ring-closure. The starting materials are cheaper than those used in previous methods. |
| priorityDate |
1967-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |